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1. (WO2018084984) METHOD OF BOREHOLE TIME-LAPSE MONITORING USING SEISMIC WAVES

Pub. No.:    WO/2018/084984    International Application No.:    PCT/US2017/055143
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Thu Oct 05 01:59:59 CEST 2017
IPC: G01V 1/30
G01V 8/16
Applicants: SHELL OIL COMPANY
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
Inventors: MATEEVA, Albena Alexandrova
ZWARTJES, Paul Maarten
Title: METHOD OF BOREHOLE TIME-LAPSE MONITORING USING SEISMIC WAVES
Abstract:
Receiver-consistent scalars of seismic receiver channels are used for time-lapse monitoring of a sub-surface earth formation. Signals are induced by seismic waves propagating through the earth formation adjacent to each respective seismic receiver channel. Each seismic receiver channel is acoustically coupled to the earth formation as present directly adjacent to the location of the seismic receiver channel in question. The base receiver-consistent scalars and the monitor receiver-consistent scalars of seismic receiver channels can be outputted to reveal changes in these receiver-consistent scalars. These changes can be used to delineate information about physical changes in the subsurface earth formation. The changes in the based receiver-consistent scalars and the monitor receiver-consistent scalars may be displayed visually.